<?php

/*
	Question2Answer (c) Gideon Greenspan

	http://www.question2answer.org/

	
	File: qa-include/qa-page.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: Routing and utility functions for page requests


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
    header('Location: ../');
    exit;
}

require_once QA_INCLUDE_DIR . 'qa-app-cookies.php';
require_once QA_INCLUDE_DIR . 'qa-app-format.php';
require_once QA_INCLUDE_DIR . 'qa-app-users.php';
require_once QA_INCLUDE_DIR . 'qa-app-options.php';
require_once QA_INCLUDE_DIR . 'qa-db-selects.php';


//	Functions which are called at the bottom of this file

function qa_page_db_fail_handler($type, $errno = null, $error = null, $query = null)
    /*
        Standard database failure handler function which bring up the install/repair/upgrade page
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    $pass_failure_type = $type;
    $pass_failure_errno = $errno;
    $pass_failure_error = $error;
    $pass_failure_query = $query;

    require QA_INCLUDE_DIR . 'qa-install.php';

    qa_exit('error');
}


function qa_page_queue_pending()
    /*
        Queue any pending requests which are required independent of which page will be shown
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    qa_preload_options();
    $loginuserid = qa_get_logged_in_userid();

    if (isset($loginuserid)) {
        if (!QA_FINAL_EXTERNAL_USERS)
            qa_db_queue_pending_select('loggedinuser', qa_db_user_account_selectspec($loginuserid, true));

        qa_db_queue_pending_select('notices', qa_db_user_notices_selectspec($loginuserid));
        qa_db_queue_pending_select('favoritenonqs', qa_db_user_favorite_non_qs_selectspec($loginuserid));
        qa_db_queue_pending_select('userlimits', qa_db_user_limits_selectspec($loginuserid));
        qa_db_queue_pending_select('userlevels', qa_db_user_levels_selectspec($loginuserid, true));
    }

    qa_db_queue_pending_select('iplimits', qa_db_ip_limits_selectspec(qa_remote_ip_address()));
    qa_db_queue_pending_select('navpages', qa_db_pages_selectspec(array('B', 'M', 'O', 'F')));
    qa_db_queue_pending_select('widgets', qa_db_widgets_selectspec());
}


function qa_load_state()
    /*
        Check the page state parameter and then remove it from the $_GET array
    */
{
    global $qa_state;

    $qa_state = qa_get('state');
    unset($_GET['state']); // to prevent being passed through on forms
}


function qa_check_login_modules()
    /*
        If no user is logged in, call through to the login modules to see if they want to log someone in
    */
{
    if ((!QA_FINAL_EXTERNAL_USERS) && !qa_is_logged_in()) {
        $loginmodules = qa_load_modules_with('login', 'check_login');

        foreach ($loginmodules as $loginmodule) {
            $loginmodule->check_login();
            if (qa_is_logged_in()) // stop and reload page if it worked
                qa_redirect(qa_request(), $_GET);
        }
    }
}


function qa_check_page_clicks()
    /*
        React to any of the common buttons on a page for voting, favorites and closing a notice
        If the user has Javascript on, these should come through Ajax rather than here.
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    global $qa_page_error_html;

    if (qa_is_http_post())
        foreach ($_POST as $field => $value) {
            if (strpos($field, 'vote_') === 0) { // voting...
                @list($dummy, $postid, $vote, $anchor) = explode('_', $field);

                if (isset($postid) && isset($vote)) {
                    if (!qa_check_form_security_code('vote', qa_post_text('code')))
                        $qa_page_error_html = qa_lang_html('misc/form_security_again');

                    else {
                        require_once QA_INCLUDE_DIR . 'qa-app-votes.php';
                        require_once QA_INCLUDE_DIR . 'qa-db-selects.php';

                        $userid = qa_get_logged_in_userid();

                        $post = qa_db_select_with_pending(qa_db_full_post_selectspec($userid, $postid));
                        $qa_page_error_html = qa_vote_error_html($post, $vote, $userid, qa_request());

                        if (!$qa_page_error_html) {
                            qa_vote_set($post, $userid, qa_get_logged_in_handle(), qa_cookie_get(), $vote);
                            qa_redirect(qa_request(), $_GET, null, null, $anchor);
                        }
                        break;
                    }
                }

            } elseif (strpos($field, 'favorite_') === 0) { // favorites...
                @list($dummy, $entitytype, $entityid, $favorite) = explode('_', $field);

                if (isset($entitytype) && isset($entityid) && isset($favorite)) {
                    if (!qa_check_form_security_code('favorite-' . $entitytype . '-' . $entityid, qa_post_text('code')))
                        $qa_page_error_html = qa_lang_html('misc/form_security_again');

                    else {
                        require_once QA_INCLUDE_DIR . 'qa-app-favorites.php';

                        qa_user_favorite_set(qa_get_logged_in_userid(), qa_get_logged_in_handle(), qa_cookie_get(), $entitytype, $entityid, $favorite);
                        qa_redirect(qa_request(), $_GET);
                    }
                }

            } elseif (strpos($field, 'notice_') === 0) { // notices...
                @list($dummy, $noticeid) = explode('_', $field);

                if (isset($noticeid)) {
                    if (!qa_check_form_security_code('notice-' . $noticeid, qa_post_text('code')))
                        $qa_page_error_html = qa_lang_html('misc/form_security_again');

                    else {
                        if ($noticeid == 'visitor')
                            setcookie('qa_noticed', 1, time() + 86400 * 3650, '/', QA_COOKIE_DOMAIN);

                        elseif ($noticeid == 'welcome') {
                            require_once QA_INCLUDE_DIR . 'qa-db-users.php';
                            qa_db_user_set_flag(qa_get_logged_in_userid(), QA_USER_FLAGS_WELCOME_NOTICE, false);

                        } else {
                            require_once QA_INCLUDE_DIR . 'qa-db-notices.php';
                            qa_db_usernotice_delete(qa_get_logged_in_userid(), $noticeid);
                        }

                        qa_redirect(qa_request(), $_GET);
                    }
                }
            }
        }
}


function qa_get_request_content()
    /*
        Run the appropriate qa-page-*.php file for this request and return back the $qa_content it passed
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    $requestlower = strtolower(qa_request());
    $requestparts = qa_request_parts();
    $firstlower = strtolower($requestparts[0]);
    $routing = qa_page_routing();

    if (isset($routing[$requestlower])) {
        qa_set_template($firstlower);
        $qa_content = require QA_INCLUDE_DIR . $routing[$requestlower];

    } elseif (isset($routing[$firstlower . '/'])) {
        qa_set_template($firstlower);
        $qa_content = require QA_INCLUDE_DIR . $routing[$firstlower . '/'];

    } elseif (is_numeric($requestparts[0])) {
        qa_set_template('question');
        $qa_content = require QA_INCLUDE_DIR . 'qa-page-question.php';

    } else {
        qa_set_template(strlen($firstlower) ? $firstlower : 'qa'); // will be changed later
        $qa_content = require QA_INCLUDE_DIR . 'qa-page-default.php'; // handles many other pages, including custom pages and page modules
    }

    if ($firstlower == 'admin') {
        $_COOKIE['qa_admin_last'] = $requestlower; // for navigation tab now...
        setcookie('qa_admin_last', $_COOKIE['qa_admin_last'], 0, '/', QA_COOKIE_DOMAIN); // ...and in future
    }

    qa_set_form_security_key();

    return $qa_content;
}


function qa_output_content($qa_content)
    /*
        Output the $qa_content via the theme class after doing some pre-processing, mainly relating to Javascript
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    global $qa_template;

    $requestlower = strtolower(qa_request());

    //	Set appropriate selected flags for navigation (not done in qa_content_prepare() since it also applies to sub-navigation)

    foreach ($qa_content['navigation'] as $navtype => $navigation)
        if (is_array($navigation) && ($navtype != 'cat'))
            foreach ($navigation as $navprefix => $navlink)
                if (substr($requestlower . '$', 0, strlen($navprefix)) == $navprefix)
                    $qa_content['navigation'][$navtype][$navprefix]['selected'] = true;

    //	Slide down notifications

    if (!empty($qa_content['notices']))
        foreach ($qa_content['notices'] as $notice) {
            $qa_content['script_onloads'][] = array(
                "qa_reveal(document.getElementById(" . qa_js($notice['id']) . "), 'notice');",
            );
        }

    //	Handle maintenance mode

    if (qa_opt('site_maintenance') && ($requestlower != 'login')) {
        if (qa_get_logged_in_level() >= QA_USER_LEVEL_ADMIN) {
            if (!isset($qa_content['error']))
                $qa_content['error'] = strtr(qa_lang_html('admin/maintenance_admin_only'), array(
                    '^1' => '<a href="' . qa_path_html('admin/general') . '">',
                    '^2' => '</a>',
                ));

        } else {
            $qa_content = qa_content_prepare();
            $qa_content['error'] = qa_lang_html('misc/site_in_maintenance');
        }
    }

    //	Handle new users who must confirm their email now, or must be approved before continuing

    $userid = qa_get_logged_in_userid();
    if (isset($userid) && ($requestlower != 'confirm') && ($requestlower != 'account')) {
        $flags = qa_get_logged_in_flags();

        if (($flags & QA_USER_FLAGS_MUST_CONFIRM) && (!($flags & QA_USER_FLAGS_EMAIL_CONFIRMED)) && qa_opt('confirm_user_emails')) {
            $qa_content = qa_content_prepare();
            $qa_content['title'] = qa_lang_html('users/confirm_title');
            $qa_content['error'] = strtr(qa_lang_html('users/confirm_required'), array(
                '^1' => '<a href="' . qa_path_html('confirm') . '">',
                '^2' => '</a>',
            ));

        } elseif (($flags & QA_USER_FLAGS_MUST_APPROVE) && (qa_get_logged_in_level() < QA_USER_LEVEL_APPROVED) && qa_opt('moderate_users')) {
            $qa_content = qa_content_prepare();
            $qa_content['title'] = qa_lang_html('users/approve_title');
            $qa_content['error'] = strtr(qa_lang_html('users/approve_required'), array(
                '^1' => '<a href="' . qa_path_html('account') . '">',
                '^2' => '</a>',
            ));
        }
    }

    //	Combine various Javascript elements in $qa_content into single array for theme layer

    $script = array('<script type="text/javascript">');

    if (isset($qa_content['script_var']))
        foreach ($qa_content['script_var'] as $var => $value)
            $script[] = 'var ' . $var . '=' . qa_js($value) . ';';

    if (isset($qa_content['script_lines']))
        foreach ($qa_content['script_lines'] as $scriptlines) {
            $script[] = '';
            $script = array_merge($script, $scriptlines);
        }

    if (isset($qa_content['focusid']))
        $qa_content['script_onloads'][] = array(
            "var elem=document.getElementById(" . qa_js($qa_content['focusid']) . ");",
            "if (elem) {",
            "\telem.select();",
            "\telem.focus();",
            "}",
        );

    if (isset($qa_content['script_onloads'])) {
        array_push($script,
            '',
            'var qa_oldonload=window.onload;',
            'window.onload=function() {',
            "\tif (typeof qa_oldonload=='function')",
            "\t\tqa_oldonload();"
        );

        foreach ($qa_content['script_onloads'] as $scriptonload) {
            $script[] = "\t";

            foreach ((array)$scriptonload as $scriptline)
                $script[] = "\t" . $scriptline;
        }

        $script[] = '};';
    }

    $script[] = '</script>';

    if (isset($qa_content['script_rel'])) {
        $uniquerel = array_unique($qa_content['script_rel']); // remove any duplicates
        foreach ($uniquerel as $script_rel)
            $script[] = '<script src="' . qa_html(qa_path_to_root() . $script_rel) . '" type="text/javascript"></script>';
    }

    if (isset($qa_content['script_src'])) {
        $uniquesrc = array_unique($qa_content['script_src']); // remove any duplicates
        foreach ($uniquesrc as $script_src)
            $script[] = '<script src="' . qa_html($script_src) . '" type="text/javascript"></script>';
    }

    $qa_content['script'] = $script;

    //	Load the appropriate theme class and output the page

    $themeclass = qa_load_theme_class(qa_get_site_theme(), (substr($qa_template, 0, 7) == 'custom-') ? 'custom' : $qa_template, $qa_content, qa_request());

    header('Content-type: ' . $qa_content['content_type']);

    $themeclass->doctype();
    $themeclass->html();
    $themeclass->finish();
}


function qa_do_content_stats($qa_content)
    /*
        Update any statistics required by the fields in $qa_content, and return true if something was done
    */
{
    if (isset($qa_content['inc_views_postid'])) {
        require_once QA_INCLUDE_DIR . 'qa-db-hotness.php';
        qa_db_hotness_update($qa_content['inc_views_postid'], null, true);
        return true;
    }

    return false;
}


//	Other functions which might be called from anywhere

function qa_page_routing()
    /*
        Return an array of the default Q2A requests and which qa-page-*.php file implements them
        If the key of an element ends in /, it should be used for any request with that key as its prefix
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    return array(
        'account' => 'qa-page-account.php',
        'activity/' => 'qa-page-activity.php',
        'admin/' => 'qa-page-admin-default.php',
        'admin/approve' => 'qa-page-admin-approve.php',
        'admin/categories' => 'qa-page-admin-categories.php',
        'admin/flagged' => 'qa-page-admin-flagged.php',
        'admin/hidden' => 'qa-page-admin-hidden.php',
        'admin/layoutwidgets' => 'qa-page-admin-widgets.php',
        'admin/moderate' => 'qa-page-admin-moderate.php',
        'admin/pages' => 'qa-page-admin-pages.php',
        'admin/plugins' => 'qa-page-admin-plugins.php',
        'admin/points' => 'qa-page-admin-points.php',
        'admin/recalc' => 'qa-page-admin-recalc.php',
        'admin/stats' => 'qa-page-admin-stats.php',
        'admin/userfields' => 'qa-page-admin-userfields.php',
        'admin/usertitles' => 'qa-page-admin-usertitles.php',
        'answers/' => 'qa-page-answers.php',
        'ask' => 'qa-page-ask.php',
        'categories/' => 'qa-page-categories.php',
        'comments/' => 'qa-page-comments.php',
        'confirm' => 'qa-page-confirm.php',
        'favorites' => 'qa-page-favorites.php',
        'feedback' => 'qa-page-feedback.php',
        'forgot' => 'qa-page-forgot.php',
        'hot/' => 'qa-page-hot.php',
        'ip/' => 'qa-page-ip.php',
        'login' => 'qa-page-login.php',
        'logout' => 'qa-page-logout.php',
        'message/' => 'qa-page-message.php',
        'needs/' => 'qa-page-needs.php',
        'questions/' => 'qa-page-questions.php',
        'register' => 'qa-page-register.php',
        'reset' => 'qa-page-reset.php',
        'search' => 'qa-page-search.php',
        'tag/' => 'qa-page-tag.php',
        'tags' => 'qa-page-tags.php',
        'unanswered/' => 'qa-page-unanswered.php',
        'unsubscribe' => 'qa-page-unsubscribe.php',
        'updates' => 'qa-page-updates.php',
        'user/' => 'qa-page-user.php',
        'users' => 'qa-page-users.php',
        'users/blocked' => 'qa-page-users-blocked.php',
        'users/special' => 'qa-page-users-special.php',
    );
}


function qa_set_template($template)
    /*
        Sets the template which should be passed to the theme class, telling it which type of page it's displaying
    */
{
    global $qa_template;
    $qa_template = $template;
}


function qa_content_prepare($voting = false, $categoryids = null)
    /*
        Start preparing theme content in global $qa_content variable, with or without $voting support,
        in the context of the categories in $categoryids (if not null)
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    global $qa_template, $qa_page_error_html;

    if (QA_DEBUG_PERFORMANCE)
        qa_usage_mark('control');

    $request = qa_request();
    $requestlower = qa_request();
    $navpages = qa_db_get_pending_result('navpages');
    $widgets = qa_db_get_pending_result('widgets');

    if (isset($categoryids) && !is_array($categoryids)) // accept old-style parameter
        $categoryids = array($categoryids);

    $lastcategoryid = count($categoryids) ? end($categoryids) : null;

    $qa_content = array(
        'content_type' => 'text/html; charset=utf-8',

        'site_title' => qa_html(qa_opt('site_title')),

        'head_lines' => array(),

        'navigation' => array(
            'user' => array(),

            'main' => array(),

            'footer' => array(
                'feedback' => array(
                    'url' => qa_path_html('feedback'),
                    'label' => qa_lang_html('main/nav_feedback'),
                )
            ),

        ),

        'sidebar' => qa_opt('show_custom_sidebar') ? qa_opt('custom_sidebar') : null,

        'sidepanel' => qa_opt('show_custom_sidepanel') ? qa_opt('custom_sidepanel') : null,

        'widgets' => array(),
    );

    if (qa_opt('show_custom_in_head'))
        $qa_content['head_lines'][] = qa_opt('custom_in_head');

    if (qa_opt('show_custom_header'))
        $qa_content['body_header'] = qa_opt('custom_header');

    if (qa_opt('show_custom_footer'))
        $qa_content['body_footer'] = qa_opt('custom_footer');

    if (isset($categoryids))
        $qa_content['categoryids'] = $categoryids;

    foreach ($navpages as $page)
        if ($page['nav'] == 'B')
            qa_navigation_add_page($qa_content['navigation']['main'], $page);

    if (qa_opt('nav_home') && qa_opt('show_custom_home'))
        $qa_content['navigation']['main']['$'] = array(
            'url' => qa_path_html(''),
            'label' => qa_lang_html('main/nav_home'),
        );

    if (qa_opt('nav_activity'))
        $qa_content['navigation']['main']['activity'] = array(
            'url' => qa_path_html('activity'),
            'label' => qa_lang_html('main/nav_activity'),
        );

    $hascustomhome = qa_has_custom_home();

    if (qa_opt($hascustomhome ? 'nav_qa_not_home' : 'nav_qa_is_home'))
        $qa_content['navigation']['main'][$hascustomhome ? 'qa' : '$'] = array(
            'url' => qa_path_html($hascustomhome ? 'qa' : ''),
            'label' => qa_lang_html('main/nav_qa'),
        );

    if (qa_opt('nav_questions'))
        $qa_content['navigation']['main']['questions'] = array(
            'url' => qa_path_html('questions'),
            'label' => qa_lang_html('main/nav_qs'),
        );

    if (qa_opt('nav_hot'))
        $qa_content['navigation']['main']['hot'] = array(
            'url' => qa_path_html('hot'),
            'label' => qa_lang_html('main/nav_hot'),
        );

    if (qa_opt('nav_unanswered'))
        $qa_content['navigation']['main']['unanswered'] = array(
            'url' => qa_path_html('unanswered'),
            'label' => qa_lang_html('main/nav_unanswered'),
        );

    if (qa_using_tags() && qa_opt('nav_tags'))
        $qa_content['navigation']['main']['tag'] = array(
            'url' => qa_path_html('tags'),
            'label' => qa_lang_html('main/nav_tags'),
        );

    if (qa_using_categories() && qa_opt('nav_categories'))
        $qa_content['navigation']['main']['categories'] = array(
            'url' => qa_path_html('categories'),
            'label' => qa_lang_html('main/nav_categories'),
        );

    if (qa_opt('nav_users'))
        $qa_content['navigation']['main']['user'] = array(
            'url' => qa_path_html('users'),
            'label' => qa_lang_html('main/nav_users'),
        );

    // Only the 'level' permission error prevents the menu option being shown - others reported on qa-page-ask.php

    if (qa_opt('nav_ask') && (qa_user_maximum_permit_error('permit_post_q') != 'level'))
        $qa_content['navigation']['main']['ask'] = array(
            'url' => qa_path_html('ask', (qa_using_categories() && strlen($lastcategoryid)) ? array('cat' => $lastcategoryid) : null),
            'label' => qa_lang_html('main/nav_ask'),
        );


    if (
        (qa_get_logged_in_level() >= QA_USER_LEVEL_ADMIN) ||
        (!qa_user_maximum_permit_error('permit_moderate')) ||
        (!qa_user_maximum_permit_error('permit_hide_show')) ||
        (!qa_user_maximum_permit_error('permit_delete_hidden'))
    )
        $qa_content['navigation']['main']['admin'] = array(
            'url' => qa_path_html('admin'),
            'label' => qa_lang_html('main/nav_admin'),
        );


    $qa_content['search'] = array(
        'form_tags' => 'method="get" action="' . qa_path_html('search') . '"',
        'form_extra' => qa_path_form_html('search'),
        'title' => qa_lang_html('main/search_title'),
        'field_tags' => 'name="q"',
        'button_label' => qa_lang_html('main/search_button'),
    );

    if (!qa_opt('feedback_enabled'))
        unset($qa_content['navigation']['footer']['feedback']);

    foreach ($navpages as $page)
        if (($page['nav'] == 'M') || ($page['nav'] == 'O') || ($page['nav'] == 'F'))
            qa_navigation_add_page($qa_content['navigation'][($page['nav'] == 'F') ? 'footer' : 'main'], $page);

    $regioncodes = array(
        'F' => 'full',
        'M' => 'main',
        'S' => 'side',
    );

    $placecodes = array(
        'T' => 'top',
        'H' => 'high',
        'L' => 'low',
        'B' => 'bottom',
    );

    foreach ($widgets as $widget)
        if (is_numeric(strpos(',' . $widget['tags'] . ',', ',' . $qa_template . ',')) || is_numeric(strpos(',' . $widget['tags'] . ',', ',all,'))) { // see if it has been selected for display on this template
            $region = @$regioncodes[substr($widget['place'], 0, 1)];
            $place = @$placecodes[substr($widget['place'], 1, 2)];

            if (isset($region) && isset($place)) { // check region/place codes recognized
                $module = qa_load_module('widget', $widget['title']);

                if (
                    isset($module) &&
                    method_exists($module, 'allow_template') &&
                    $module->allow_template((substr($qa_template, 0, 7) == 'custom-') ? 'custom' : $qa_template) &&
                    method_exists($module, 'allow_region') &&
                    $module->allow_region($region) &&
                    method_exists($module, 'output_widget')
                )
                    $qa_content['widgets'][$region][$place][] = $module; // if module loaded and happy to be displayed here, tell theme about it
            }
        }

    $logoshow = qa_opt('logo_show');
    $logourl = qa_opt('logo_url');
    $logowidth = qa_opt('logo_width');
    $logoheight = qa_opt('logo_height');

    if ($logoshow)
        $qa_content['logo'] = '<a href="' . qa_path_html('') . '" class="qa-logo-link" title="' . qa_html(qa_opt('site_title')) . '">' .
            '<img src="' . qa_html(is_numeric(strpos($logourl, '://')) ? $logourl : qa_path_to_root() . $logourl) . '"' .
            ($logowidth ? (' width="' . $logowidth . '"') : '') . ($logoheight ? (' height="' . $logoheight . '"') : '') .
            ' border="0" alt="' . qa_html(qa_opt('site_title')) . '"/></a>';
    else
        $qa_content['logo'] = '<a href="' . qa_path_html('') . '" class="qa-logo-link">' . qa_html(qa_opt('site_title')) . '</a>';

    $topath = qa_get('to'); // lets user switch between login and register without losing destination page

    $userlinks = qa_get_login_links(qa_path_to_root(), isset($topath) ? $topath : qa_path($request, $_GET, ''));

    $qa_content['navigation']['user'] = array();

    if (qa_is_logged_in()) {
        $qa_content['loggedin'] = qa_lang_html_sub_split('main/logged_in_x', QA_FINAL_EXTERNAL_USERS
                ? qa_get_logged_in_user_html(qa_get_logged_in_user_cache(), qa_path_to_root(), false)
                : qa_get_one_user_html(qa_get_logged_in_handle(), false)
        );

        if (!QA_FINAL_EXTERNAL_USERS)
            $qa_content['navigation']['user']['account'] = array(
                'url' => qa_path_html('account'),
                'label' => qa_lang_html('main/nav_account'),
            );

        $qa_content['navigation']['user']['updates'] = array(
            'url' => qa_path_html('updates'),
            'label' => qa_lang_html('main/nav_updates'),
        );

        if (!empty($userlinks['logout']))
            $qa_content['navigation']['user']['logout'] = array(
                'url' => qa_html(@$userlinks['logout']),
                'label' => qa_lang_html('main/nav_logout'),
            );

        if (!QA_FINAL_EXTERNAL_USERS) {
            $source = qa_get_logged_in_source();

            if (strlen($source)) {
                $loginmodules = qa_load_modules_with('login', 'match_source');

                foreach ($loginmodules as $module)
                    if ($module->match_source($source) && method_exists($module, 'logout_html')) {
                        ob_start();
                        $module->logout_html(qa_path('logout', array(), qa_opt('site_url')));
                        $qa_content['navigation']['user']['logout'] = array('label' => ob_get_clean());
                    }
            }
        }

        $notices = qa_db_get_pending_result('notices');
        foreach ($notices as $notice)
            $qa_content['notices'][] = qa_notice_form($notice['noticeid'], qa_viewer_html($notice['content'], $notice['format']), $notice);

    } else {
        require_once QA_INCLUDE_DIR . 'qa-util-string.php';

        if (!QA_FINAL_EXTERNAL_USERS) {
            $loginmodules = qa_load_modules_with('login', 'login_html');

            foreach ($loginmodules as $tryname => $module) {
                ob_start();
                $module->login_html(isset($topath) ? (qa_opt('site_url') . $topath) : qa_path($request, $_GET, qa_opt('site_url')), 'menu');
                $label = ob_get_clean();

                if (strlen($label))
                    $qa_content['navigation']['user'][implode('-', qa_string_to_words($tryname))] = array('label' => $label);
            }
        }

        if (!empty($userlinks['login']))
            $qa_content['navigation']['user']['login'] = array(
                'url' => qa_html(@$userlinks['login']),
                'label' => qa_lang_html('main/nav_login'),
            );

        if (!empty($userlinks['register']))
            $qa_content['navigation']['user']['register'] = array(
                'url' => qa_html(@$userlinks['register']),
                'label' => qa_lang_html('main/nav_register'),
            );
    }

    if (QA_FINAL_EXTERNAL_USERS || !qa_is_logged_in()) {
        if (qa_opt('show_notice_visitor') && (!isset($topath)) && (!isset($_COOKIE['qa_noticed'])))
            $qa_content['notices'][] = qa_notice_form('visitor', qa_opt('notice_visitor'));

    } else {
        setcookie('qa_noticed', 1, time() + 86400 * 3650, '/', QA_COOKIE_DOMAIN); // don't show first-time notice if a user has logged in

        if (qa_opt('show_notice_welcome') && (qa_get_logged_in_flags() & QA_USER_FLAGS_WELCOME_NOTICE))
            if (($requestlower != 'confirm') && ($requestlower != 'account')) // let people finish registering in peace
                $qa_content['notices'][] = qa_notice_form('welcome', qa_opt('notice_welcome'));
    }

    $qa_content['script_rel'] = array('qa-content/jquery-1.7.2.min.js');
    $qa_content['script_rel'][] = 'qa-content/qa-page.js?' . QA_VERSION;

    if ($voting)
        $qa_content['error'] = @$qa_page_error_html;

    $qa_content['script_var'] = array(
        'qa_root' => qa_path_to_root(),
        'qa_request' => $request,
    );

    return $qa_content;
}


function qa_get_start()
    /*
        Get the start parameter which should be used, as constrained by the setting in qa-config.php
    */
{
    return min(max(0, (int)qa_get('start')), QA_MAX_LIMIT_START);
}


function qa_get_state()
    /*
        Get the state parameter which should be used, as set earlier in qa_load_state()
    */
{
    global $qa_state;
    return $qa_state;
}


//	Below are the steps that actually execute for this file - all the above are function definitions

qa_report_process_stage('init_page');
qa_db_connect('qa_page_db_fail_handler');

qa_page_queue_pending();
qa_load_state();
qa_check_login_modules();

if (QA_DEBUG_PERFORMANCE)
    qa_usage_mark('setup');

qa_check_page_clicks();

$qa_content = qa_get_request_content();

if (is_array($qa_content)) {
    if (QA_DEBUG_PERFORMANCE)
        qa_usage_mark('view');

    qa_output_content($qa_content);

    if (QA_DEBUG_PERFORMANCE)
        qa_usage_mark('theme');

    if (qa_do_content_stats($qa_content))
        if (QA_DEBUG_PERFORMANCE)
            qa_usage_mark('stats');

    if (QA_DEBUG_PERFORMANCE)
        qa_usage_output();
}

qa_db_disconnect();


/*
	Omit PHP closing tag to help avoid accidental output
*/